Joni Tammi

Joni Tammi

Head of Department
Metsähovi Radio Observatory
Full researcher profile
https://research.aalto.fi/...
Phone number
+358294424858

Areas of expertise

Astrophysics, Astronomy, Teaching, Radio astronomy, Numerical modelling, Pedagogy, 115 Astronomy and space science, 516 Educational sciences, The Milky Way, galaxies and cosmology, Computational science, Adult education, Vocational education research, Fluid and plasma physics

Publications

A near magnetic-to-kinetic energy equipartition flare from the relativistic jet in AO 0235 + 164 during 2013–2019

Whee Yeon Cheong, Sang Sung Lee, Sang Hyun Kim, Sincheol Kang, Jae Young Kim, Bindu Rani, Anthony C.S. Readhead, Sebastian Kiehlmann, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, Iván Agudo, Antonio Fuentes, Efthalia Traianou, Juan Escudero, Clemens Thum, Ioannis Myserlis, Carolina Casadio, Mark Gurwell 2024 Monthly Notices of the Royal Astronomical Society

Time variability of the core-shift effect in the blazar 3C 454.3

Wara Chamani, Tuomas Savolainen, Eduardo Ros, Yuri Y. Kovalev, Kaj Wiik, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi 2023 Astronomy and Astrophysics

Quasi-periodic behaviour in the radio and gamma-ray light curves of blazar PKS 1510-089

XP Li, Y Cai, HY Yang, A Lahteenmaki, M Tornikoski, J Tammi, S Suutarinen, Hai-Tao Yang, YH Luo, LS Wang 2023 Monthly Notices of the Royal Astronomical Society

Radio and γ-Ray Variability in Blazar S5 0716+714: A Year-like Quasi-periodic Oscillation in the Radio Light Curve

Xiao Pan Li, Hai Yan Yang, Yan Cai, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Sofia Suutarinen, Hai Tao Yang, Yu Hui Luo, Li Sha Wang 2023 Astrophysical Journal

Multiwavelength Temporal Variability of the Blazar PKS 1510–089

Q. Yuan, Pankaj Kushwaha, Alok C. Gupta, Ashutosh Tripathi, Paul J. Wiita, M. Zhang, X. Liu, Anne Lähteenmäki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, L. Cui, X. Wang, M. F. Gu, Cosimo Bambi, A. E. Volvach 2023 Astrophysical Journal

Investigating the Blazar TXS 0506+056 through Sharp Multiwavelength Eyes during 2017-2019

V. A. Acciari, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, M. Artero, K. Asano, D. Baack, A. Babić, A. Baquero, U. Barres De Almeida, J. A. Barrio, I. Batković, J. Becerra González, W. Bednarek, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, H. Bökenkamp, G. Bonnoli, Å1/2 Bošnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D'Amico, V. D'Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, A. Del Popolo, M. Delfino, V. Fallah Ramazani, T. Hovatta, A. Lähteenmäki, M. Tornikoski, J. Tammi 2022 The Astrophysical Journal

Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020

V. A. Acciari, S. Ansoldi, L. A. Antonelli, A. Arbet Engels, M. Artero, K. Asano, D. Baack, A. Babic, A. Baquero, U. Barres de Almeida, J. A. Barrio, J. Becerra Gonzalez, W. Bednarek, L. Bellizzi, E. Bernardini, M. Bernardos, A. Berti, J. Besenrieder, W. Bhattacharyya, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Z. Bosnjak, G. Busetto, R. Carosi, G. Ceribella, M. Cerruti, Y. Chai, A. Chilingarian, S. Cikota, S. M. Colak, E. Colombo, J. L. Contreras, J. Cortina, S. Covino, G. D'Amico, V. D'Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, M. Delfino, J. Delgado, C. Delgado Mendez, D. Depaoli, F. Di Pierro, L. Di Venere, E. Do Souto Espineira, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, V. Fallah Ramazani, A. Fattorini, G. Ferrara, M. Fonseca, L. Font, C. Fruck, S. Fukami, R. J. Garcia Lopez, M. Garczarczyk, S. Gasparyan, M. Gaug, N. Giglietto, F. Giordano, P. Gliwny, N. Godinovic, J. G. Green, D. Green, D. Hadasch, A. Hahn, L. Heckmann, J. Herrera, J. Hoang, D. Hrupec, M. Hutten, T. Inada, S. Inoue, K. Ishio, Y. Iwamura, I. Jimenez, J. Jormanainen, L. Jouvin, Y. Kajiwara, M. Karjalainen, D. Kerszberg, Y. Kobayashi, H. Kubo, J. Kushida, A. Lamastra, D. Lelas, F. Leone, E. Lindfors, S. Lombardi, F. Longo, R. Lopez-Coto, M. Lopez-Moya, A. Lopez-Oramas, S. Loporchio, B. Machado de Oliveira Fraga, C. Maggio, P. Majumdar, M. Makariev, M. Mallamaci, G. Maneva, M. Manganaro, K. Mannheim, L. Maraschi, M. Mariotti, M. Martinez, D. Mazin, S. Menchiari, S. Mender, S. Micanovic, D. Miceli, T. Miener, M. Minev, J. M. Miranda, R. Mirzoyan, E. Molina, A. Moralejo, D. Morcuende, Diana Moreno, E. Moretti, V. Neustroev, C. Nigro, K. Nilsson, K. Nishijima, K. Noda, S. Nozaki, Y. Ohtani, T. Oka, J. Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. M. Paredes, L. Pavletic, P. Penil, C. Perennes, M. Persic, P. G. Prada Moroni, E. Prandini, C. Priyadarshi, Ivica Puljak, W. Rhode, M. Ribo, J. Rico, C. Righi, A. Rugliancich, L. Saha, N. Sahakyan, T. Saito, S. Sakurai, K. Satalecka, F. G. Saturni, B. Schleicher, K. Schmidt, T. Schweizer, J. Sitarek, D. Sobczynska, A. Spolon, A. Stamerra, D. Strom, M. Strzys, Y. Suda, T. Suric, M. Takahashi, F. Tavecchio, P. Temnikov, T. Terzic, M. Teshima, L. Tosti, S. Truzzi, A. Tutone, S. Ubach, J. van Scherpenberg, G. Vanzo, M. Vazquez Acosta, S. Ventura, V. Verguilov, C. F. Vigorito, V. Vitale, I. Vovk, M. Will, C. Wunderlich, D. Zaric, F. de Palma, F. D'Ammando, A. Barnacka, D. K. Sahu, M. Hodges, T. Hovatta, S. Kiehlmann, W. Max-Moerbeck, A. C. S. Readhead, R. Reeves, T. J. Pearson, A. Lahteenmaki, M. Tornikoski, J. Tammi, S. Suutarinen, K. Hada, K. Niinuma 2022 Monthly Notices of the Royal Astronomical Society

Multiwavelength Variability Power Spectrum Analysis of the Blazars 3C 279 and PKS 1510-089 on Multiple Timescales

Arti Goyal, Marian Soida, Łukasz Stawarz, Paul J. Wiita, Kari Nilsson, Svetlana Jorstad, Alan P. Marscher, Margo F. Aller, Hugh D. Aller, Anne Lähteenmäki, Talvikki Hovatta, Staszek Zoła, Krzysztof Nalewajko, Merja Tornikoski, Joni Tammi, Mark Hodges, Sebastian Kiehlmann, Anthony C.S. Readhead, Walter Max-Moerbeck, Elina Lindfors, Vandad Fallah Ramazani, D. E. Reichart, D. B. Caton, Janeth Valverde, Deirdre Horan, Roopesh Ojha, Pfesesani Van Zyl 2022 The Astrophysical Journal

Calibration of CALLISTO data

Juha Kallunki, Christian Monstein, Petri Kirves, Joni Tammi, Ari Mujunen 2022

Magnetic field strengths of the synchrotron self-absorption region in the jet of CTA 102 during radio flares

Sang-Hyun Kim, Sang-Sung Lee, Jee Won Lee, Jeffrey A. Hodgson, Sincheol Kang, Juan-Carlos Algaba, Jae-Young Kim, Mark Hodges, Ivan Agudo, Antonio Fuentes, Juan Escudero, Ioannis Myserlis, Efthalia Traianou, Anne Lahteenmaki, Merja Tornikoski, Joni Tammi, Venkatessh Ramakrishnan, Emilia Jarvela 2022 Monthly Notices of the Royal Astronomical Society